Dimmer for motor-vehicles.



H. 0. JOHNSON.

DIMMER FOR MOTOR VEHICLES.

APPLICATION FILED JUNE 6. 1915.

L?;?% Patented. May 29, 1917.

INVENTOR.

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STATES lrATlhlhlT HANS 0. JUHNSON, 0F SACRAIKENTO, CALIFORNIA, ASSIGNOR 0F GEE-HALF T0 ALEX E. NGACK, 01E SACRAMENTO, CALIFORNIA.

nrnzrann FOR MGTQR-VEHICLES.

Specification of Letters Patent.

Patented May 22 9 1211?.

Application filed June 6, 1916. Serial lt'o. 101,904.

To all whom it may concern:

Be it known that I, Hans Q. Jonnson, a citizen of the United States, residing at Sacramento, in the county of Sacramento, State of California, have invented certain new and useful Improvements in Dimmers for Motor-Vehicles; and I do declare the following to be a full, clear, and exact de- .scription of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application.

This invention relates to dimmers for vehicles and particularly those electric lamps commonly used on motor vehicles, although of course it is not necessarily limited to electric lamps but may be used on other forms of lamps as well.

The object of the invention is to produce a dimer or glare disperser so that the glare will not be odious to persons traveling upon the same highway with the vehicle carrying the lights. In addition. to this the invention is designed to so difiuse and soften the light as'to render it like clear bright moonlight with no direct glaring rays but sending forth a clear, mellow and pleasant light.

A. further object of the invention is to pro duce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of the parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate the corresponding parts in the several views.

Figure 1 is a vertical section through the lamp showing my improved dimmer.

Fig. 2 is a horizontal section. of the same taken relatively on a line X-X of Fig. 1.

Fig. 3 is a plan view of the glare dispersing plate.

Referring now more particularly to the characters of reference on the drawings, the numeral 1. designates the shell of the lamp in which is the usual reflector 2, front glass 3, and lamp 4:.

My improved dimmer consists primaril of a glare dispersing plate 5 which has du l black or other similar non-reflecting color on both its surfaces. This plate is fastened to the sides of the lamp by means of lips 6 and extends at a slight upward angle to a point near the lamp 4 where it has a semicircular cut out portion 7 extending from the ends of which is an extended wire or bracket 8 which engages the lamp 4 by means of a frictional coil 9.

Disposed vertically over the face of the lamp is a curved envelop 10 made of celluloid or similar material which is bright on its inner face and frosted on its outer face. This envelop 10. extends vertically in front of the lamp and fits against the curved cut out portion 7 of the plate-5. It is provided with a small angle iron 11 by means of which it is suitably connected with the plate 5 by means of removable screws 12.

The envelop 10 fits closely against the reflector 2 atthe bottom and a small opening 13 is allowed between it and the upper side of the reflector 2. The direct reflected rays from the lamp 4, cast out by the reflector 2, pass through the frosted celluloid envelop l0 and are softened and any glare therefrom dispersed. Any of the rays cast upwardly by the reflector 2 in front of the envelop l0 strike the dull plate 5 and are dispersed.

Any rays cast downwardly from the upper side of the reflector 2'lilrewise strike the dull top of the plate 5 and are dispersed. At the same time the full strength of the lamp ahead is had through the soft light east through the envelop l0 and any of the obliquely extending rays are cast directly against the road surfaces and will cause no mconvenience or glare to persons traveling on the highways.

From the foregoing description it will readily be seen that l have produced such a device as substantially fulfils the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is:

1. The combination with a reflector and a lamp centered therein, of a dull plate extending transversely across the forward end of the reflector, and a vertical frosted translucent envelop fitted against the plate and extending over the lamp.

2. The combination with a reflector and a lamp, of a frosted translucentenvelop (555- 10 posed in front of the lamp, and a dull plate set Within the reflector in advance of the envelop.

In testimony whereof l afiix my signature.

HANS O. JOHNSON. 

